SAMOP 2021 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 2: Precision spectroscopy of atoms and ions (joint session A/Q)
A 2.1: Poster
Montag, 20. September 2021, 16:30–18:30, P
Interorbital interactions in an SU(2)⊗SU(6)-symmetric Fermi-Fermi mixture — •Koen Sponselee1, Benjamin Abeln1, Marcel Diem1, Nejira Pintul1, Klaus Sengstock1,2, and Christoph Becker1,2 — 1Center for Optical Quantum Technologies, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2Institute for Laser Physics, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
We characterise the s-wave interactions in interorbital 171Yb-173Yb Fermi-Fermi mixtures [1], where either 171Yb is excited to the 3P0 state while leaving 173Yb in the ground state, or vice versa.
Using high-resolution clock spectroscopy, we measure the elastic scattering lengths and directly show the SU(2)⊗SU(6) symmetry of both interisotope interactions, which turn out to be attractive and similar. We further measure losses in these interorbital Fermi-Fermi mixtures and observe a difference of about two orders of magnitude between both interisotope interactions.
Along with other known 1S0-3P0 state interactions of ytterbium, these measurements can be used as a benchmark for future ground-excited state Yb2 molecular potential models.
This work is supported by the DFG within the SFB 925.
[1] B. Abeln, K. Sponselee, M. Diem, N. Pintul, K. Sengstock, and C. Becker, Phys. Rev. A 103, 033315 (2021)